/Engine/Source/Runtime/Engine/Classes/GameFramework/CharacterMovementComponent.h
Adjust the size of the capsule on simulated proxies, to avoid overlaps due to replication rounding. Changes to the capsule size on the proxy should set bShrinkProxyCapsule=true and possibly callAdjustProxyCapsuleSize()immediately if applicable.
virtual void AdjustProxyCapsuleSize()